**List of steps to reproduce** (step by step, including full links if applicable):
* Type <math>0</math> in the source code
* See that nothing is printed
* I found out about the problem here: https://de.wikipedia.org/wiki/Rang_(Mathematik)#Eigenschaften, section "Eigenschaften", "Die einzige Matrix mit Rang ..." -> Then there should be a visible zero but there is nothing (see screenshot below). The network debug tool of my browser indicates that there was no transmission problem.
**What happens?**:
{F34619332}
**What should have happened instead?**:
A zero should appear. Adding a space after the zero in the <math>-block makes the zero visible.
**Software version (if not a Wikimedia wiki), browser information, screenshots, other information, etc**:
Recent Windows 10 (21H1), recent Chrome browser (version 92.0.4515.159, official build, 64-Bit)